Simms’ Guide Core Top delivers plush next-to-skin comfort as part of a dynamic layering system. For arctic days, lightweight fleece in an abrasion-resistant knit delivers anti-pilling performance for long-term durability and warmth under waders. The 9-inch zipper makes slipping in and out a breeze and allows you to dump—or hold—heat when the fishing fires up.

• Lightweight fleece designed to be worn next to skin for all day comfort as part of a layering system
• 9” YKK® zipper offers easy on/of and allows for temperature regulation when the fishing heats up
• Abrasion resistant knit offers anti-pilling performance for long term durability when worn under waders

FABRIC TECH: 100% Polyester fleece

Size Chart




Little Parts from the YKK® Fastening Products Group create The Big Difference for our customers — fastening solutions intelligently integrated with the finished product to provide the highest quality, most durable gear. The Little Parts — zippers, metal buttons and snaps, and Nylon buckles — all earn the YKK® brand. The Big Difference begins with their obsession to ensure that every individual component renders maximum value to the finished whole. That commitment instills quality and value into every product. Simms utilizes fasteners built to withstand the harshest environments and YKK® provides the best solutions to meet those needs. All Simms outerwear features nylon YKK® zippers to minimize corrosion and provide high performing, durable wear.